https://w3id.org/framester/conceptnet5/data/en/operation_research <https://w3id.org/framester/conceptnet5/schema/IsA> <https://w3id.org/framester/conceptnet5/data/en/topic_category> <https://w3id.org/framester/conceptnet5/data/en/scientific_discipline> <https://w3id.org/framester/conceptnet5/schema/RelatedTo> <https://w3id.org/framester/conceptnet5/data/en/operation_research> <https://w3id.org/framester/conceptnet5/schema/Synonym> <https://w3id.org/framester/conceptnet5/data/en/operational_research> risorse dalla linked data cloud